I'm just not particularly fond of any food that wiggles! But a memory that really sticks with me is the summer I decided to try all the "50" Baskin Robbin flavors or whatever the number was. I went along fine until I got to the letter "D" and had the "Daiquiri" ice cream. Quite the most horrid thing I'd ever tasted!
Your cautionary tale about custard slices reminds me of Vernor's, which is a particularly strong USA ginger ale mostly sold in Michigan and Wisconsin. If you're not used to Vernor's, the bubbles are so strong that it feels like you're suffocating. I can imagine someone having a coughing fit with your custard slices taking a quick belt of Vernor's as his last act on this mortal coil.
Note: some people refer to Michigan and Wisconsin as part of the Midwest. The proper term for the region is the "Upper US", as in "I come from the Upper US". Be careful how you say that, especially if you have an Italian accent.